Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Reduction/Amortization for the period	$ 2.7	$ (5.2)	$ (7.6)
Impact of changes in foreign currency rates	1.3	(1.5)	(0.3)
Discontinued Operations, Disposed of by Sale | Balcke Dürr | Guarantees and Bonds Liability | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Guarantees, at period start	2.0	4.4	8.7
Reduction/Amortization for the period	0.4	2.3	4.1
Impact of changes in foreign currency rates	(0.2)	0.1	0.2
Guarantees, at period end	1.8	2.0	4.4
Discontinued Operations, Disposed of by Sale | Balcke Dürr | Indemnification Assets | Fair Value, Measurements, Nonrecurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Non-Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Indemnification assets, at period start	0.3	1.2	2.8
Reduction/Amortization for the period	(0.3)	(0.9)	(1.5)
Impact of changes in foreign currency rates	0.0	0.0	(0.1)
Indemnification assets, at period end	$ 0.0	$ 0.3	$ 1.2